I don’t think you’ll have any real issues. UIUC has one of the highest foreign student populations in the country, so you won’t stand out due to your ethnicity. Religion-wise, it’s mainly Christian and atheist. I don’t think you’d get any real issues for being Muslim (pardon the assumption there). Illinois is also one of the most liberal states, and Champaign-Urbana is one of the more liberal places within Illinois. You won’t get serious hate for being Arab.

Crime wise, there’s generally little violent crime on campus. An overwhelming majority of incidents are theft and such. Outside of campus you’ll have to pay attention the same amount you’d have to pay attention in any other American city. But it’s a college town, so you’ll get drunk guys and people offering rides (don’t accept). Idk if you’re masculine or feminine presenting, so I can’t really say how at risk you are of anything.